Mike,
Is this something that will be added into OpenStack or made available as open source through something like stackforge ? Tim From: Mike Spreitzer [mailto:[email protected]] Sent: 20 September 2013 03:27 To: OpenStack Development Mailing List Subject: Re: [openstack-dev] Medium Availability VMs > From: Tim Bell <[email protected] <mailto:[email protected]> > > ... > Discussing with various people in the community, there seems to be > interest in a way to > > - Identify when a hypervisor is being drained or is down > and inventory its VMs > - Find the best practise way of restarting that VM for > hypervisors still available > o Live migration > o Cold migration > - Defining policies for the remaining cases > o Restart from base image > o Suspend > o Delete > > This touches multiple components from Nova/Cinder/Quantum (at minimum). > > It also touches some cloud architecture questions if OpenStack can > start to move into the low hanging fruit parts of service consolidation. > > I’d like to have some form of summit discussion in Hong Kong around > these topics but it is not clear where it fits. > > Are there others who feel similarly ? How can we fit it in ? When there are multiple viable choices, I think direction should be taken from higher layers. The operation of draining a hypervisor can be parameterized, the VMs themselves can be tagged, by an indication of which to do. I myself am working primarily on holistic infrastructure scheduling, which includes quiescing and draining hypervisors among the things it can do. Holistic scheduling works under the direction of a template/pattern/topology that describes a set of interacting resources and their relationships, and so is able to make a good decision about where VMs should move to. Re-starting a VM can require software coordination. I think holistic infrastructure scheduling is logically downstream from software coordination and upstream from infrastructure orchestration. I think the ambitions for Heat are expanding to include the latter two, and so must also have something to do with holistic infrastructure scheduling. Regards, Mike
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